<!doctype html>
<html>
<head>
<meta http-equiv='Content-Type' content='text/html; charset=UTF-8'>
<title>标题</title>
<meta name='Keywords' content=''>
<meta name='Description' content=''>
<style type='text/css'>
*{margin:0px; padding:0px; list-style-type:none; text-decoration:none; font-family:"微软雅黑";}
div.main{width: 320px; height:320px; border:1px solid red; margin:30px auto 0px; overflow: hidden;}
div.mainBox{width: 320px; height: 320px; background:url('images/lotteryBg.jpg') no-repeat center center; background-size:cover;}
</style>
</head>
<body>
<div class="main">
    <div class="mainBox"></div>
</div>
</body>
</html>